ABAP Select data from SAP table KGALC_AND_S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KGALC_AND_S table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to KGALC_AND_S. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the KGALC_AND_S table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_KGALC_AND_S TYPE STANDARD TABLE OF KGALC_AND_S,
      WA_KGALC_AND_S TYPE KGALC_AND_S,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <KGALC_AND_S> TYPE KGALC_AND_S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KGALC_AND_S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KGALC_AND_S
  INTO TABLE IT_KGALC_AND_S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KGALC_AND_S
*  INTO TABLE @DATA(IT_KGALC_AND_S2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_KGALC_AND_S INDEX 1 INTO DATA(WA_KGALC_AND_S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KGALC_AND_S ASSIGNING <KGALC_AND_S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KGALC_AND_S>-TAB = 1.
<KGALC_AND_S>-CYCLE = 1.
<KGALC_AND_S>-SDATE = 1.
<KGALC_AND_S>-EDATE = 1.
<KGALC_AND_S>-RSTATUS = 1.

ENDLOOP.

LOOP AT IT_KGALC_AND_S INTO WA_KGALC_AND_S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KGALC_AND_S-FREQ, sy-vline,
  WA_KGALC_AND_S-CRDATE, sy-vline,
  WA_KGALC_AND_S-PUSER, sy-vline,
  WA_KGALC_AND_S-MODDATE, sy-vline,
  WA_KGALC_AND_S-MODUSER, sy-vline,
  WA_KGALC_AND_S-LASTEXEC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KGALC_AND_S you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_KGALC_AND_S TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_KGALC_AND_S INTO WA_KGALC_AND_S.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field ASACC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KGALC_AND_S-ASACC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KGALC_AND_S-ASACC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ERSCH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KGALC_AND_S-ERSCH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KGALC_AND_S-ERSCH.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KGALC_AND_S_STR, 
TAB TYPE STRING,
CYCLE TYPE STRING,
SDATE TYPE STRING,
EDATE TYPE STRING,
RSTATUS TYPE STRING,
FREQ TYPE STRING,
CRDATE TYPE STRING,
PUSER TYPE STRING,
MODDATE TYPE STRING,
MODUSER TYPE STRING,
LASTEXEC TYPE STRING,
LEXECBY TYPE STRING,
TIMEEXEC TYPE STRING,
ITERFLAG TYPE STRING,
ASTATUS TYPE STRING,
CYCLESET TYPE STRING,
MODIFIED TYPE STRING,
NEW TYPE STRING,
MAX_SEQNR TYPE STRING,
MAX_SEQPOS TYPE STRING,
ALART TYPE STRING,
IPKNZ TYPE STRING,
JOB TYPE STRING,
KUMUFLAG TYPE STRING,
XXKUMUFLAG TYPE STRING,
RCKUMUFLAG TYPE STRING,
SEQNR TYPE STRING,
NAME TYPE STRING,
SEQPOS TYPE STRING,
TXT TYPE STRING,
SRULE TYPE STRING,
RRULE TYPE STRING,
ACTIVE TYPE STRING,
NEGTEST TYPE STRING,
SCSET TYPE STRING,
SSET TYPE STRING,
RSET TYPE STRING,
RCSET TYPE STRING,
SPERCENT TYPE STRING,
FACURR TYPE STRING,
SCIP TYPE STRING,
RCDATA TYPE STRING,
ASACC TYPE STRING,
PAFLDF TYPE STRING,
PAFLDG TYPE STRING,
PATXTF TYPE STRING,
PATXTG TYPE STRING,
SCIST TYPE STRING,
SCPLAN TYPE STRING,
SRULE_RLV TYPE STRING,
RRULE_RLV TYPE STRING,
SDVAL_DET TYPE STRING,
SORTFIELD TYPE STRING,
SENDER_NOT TYPE STRING,
MRULE TYPE STRING,
ABSCH TYPE STRING,
ERSCH TYPE STRING,
SWEIGHT_FACT TYPE STRING,
RWEIGHT_FACT TYPE STRING,
NODE_ID TYPE STRING,
MY_ID TYPE STRING,
RANK TYPE STRING,
FATHER TYPE STRING,
ACTION1 TYPE STRING,
SEG_LOCK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KGALC_AND_S_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_KGALC_AND_S_STR-TAB sy-vline 
WA_KGALC_AND_S_STR-CYCLE sy-vline 
WA_KGALC_AND_S_STR-SDATE sy-vline 
WA_KGALC_AND_S_STR-EDATE sy-vline 
WA_KGALC_AND_S_STR-RSTATUS sy-vline 
WA_KGALC_AND_S_STR-FREQ sy-vline 
WA_KGALC_AND_S_STR-CRDATE sy-vline 
WA_KGALC_AND_S_STR-PUSER sy-vline 
WA_KGALC_AND_S_STR-MODDATE sy-vline 
WA_KGALC_AND_S_STR-MODUSER sy-vline 
WA_KGALC_AND_S_STR-LASTEXEC sy-vline 
WA_KGALC_AND_S_STR-LEXECBY sy-vline 
WA_KGALC_AND_S_STR-TIMEEXEC sy-vline 
WA_KGALC_AND_S_STR-ITERFLAG sy-vline 
WA_KGALC_AND_S_STR-ASTATUS sy-vline 
WA_KGALC_AND_S_STR-CYCLESET sy-vline 
WA_KGALC_AND_S_STR-MODIFIED sy-vline 
WA_KGALC_AND_S_STR-NEW sy-vline 
WA_KGALC_AND_S_STR-MAX_SEQNR sy-vline 
WA_KGALC_AND_S_STR-MAX_SEQPOS sy-vline 
WA_KGALC_AND_S_STR-ALART sy-vline 
WA_KGALC_AND_S_STR-IPKNZ sy-vline 
WA_KGALC_AND_S_STR-JOB sy-vline 
WA_KGALC_AND_S_STR-KUMUFLAG sy-vline 
WA_KGALC_AND_S_STR-XXKUMUFLAG sy-vline 
WA_KGALC_AND_S_STR-RCKUMUFLAG sy-vline 
WA_KGALC_AND_S_STR-SEQNR sy-vline 
WA_KGALC_AND_S_STR-NAME sy-vline 
WA_KGALC_AND_S_STR-SEQPOS sy-vline 
WA_KGALC_AND_S_STR-TXT sy-vline 
WA_KGALC_AND_S_STR-SRULE sy-vline 
WA_KGALC_AND_S_STR-RRULE sy-vline 
WA_KGALC_AND_S_STR-ACTIVE sy-vline 
WA_KGALC_AND_S_STR-NEGTEST sy-vline 
WA_KGALC_AND_S_STR-SCSET sy-vline 
WA_KGALC_AND_S_STR-SSET sy-vline 
WA_KGALC_AND_S_STR-RSET sy-vline 
WA_KGALC_AND_S_STR-RCSET sy-vline 
WA_KGALC_AND_S_STR-SPERCENT sy-vline 
WA_KGALC_AND_S_STR-FACURR sy-vline 
WA_KGALC_AND_S_STR-SCIP sy-vline 
WA_KGALC_AND_S_STR-RCDATA sy-vline 
WA_KGALC_AND_S_STR-ASACC sy-vline 
WA_KGALC_AND_S_STR-PAFLDF sy-vline 
WA_KGALC_AND_S_STR-PAFLDG sy-vline 
WA_KGALC_AND_S_STR-PATXTF sy-vline 
WA_KGALC_AND_S_STR-PATXTG sy-vline 
WA_KGALC_AND_S_STR-SCIST sy-vline 
WA_KGALC_AND_S_STR-SCPLAN sy-vline 
WA_KGALC_AND_S_STR-SRULE_RLV sy-vline 
WA_KGALC_AND_S_STR-RRULE_RLV sy-vline 
WA_KGALC_AND_S_STR-SDVAL_DET sy-vline 
WA_KGALC_AND_S_STR-SORTFIELD sy-vline 
WA_KGALC_AND_S_STR-SENDER_NOT sy-vline 
WA_KGALC_AND_S_STR-MRULE sy-vline 
WA_KGALC_AND_S_STR-ABSCH sy-vline 
WA_KGALC_AND_S_STR-ERSCH sy-vline 
WA_KGALC_AND_S_STR-SWEIGHT_FACT sy-vline 
WA_KGALC_AND_S_STR-RWEIGHT_FACT sy-vline 
WA_KGALC_AND_S_STR-NODE_ID sy-vline 
WA_KGALC_AND_S_STR-MY_ID sy-vline 
WA_KGALC_AND_S_STR-RANK sy-vline 
WA_KGALC_AND_S_STR-FATHER sy-vline 
WA_KGALC_AND_S_STR-ACTION1 sy-vline 
WA_KGALC_AND_S_STR-SEG_LOCK sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.